#!/usr/bin/env python3
"""Seed a target project with the workflow's standard files and directories."""

from __future__ import annotations

import argparse
import json
import shutil
from datetime import datetime, timezone
from pathlib import Path


PLAYBOOK_FILES = {
    "new-project-from-scaffold": "new-project-from-scaffold.md",
    "existing-project-spec-backfill-and-refactor": "existing-project-spec-backfill-and-refactor.md",
    "spec-code-alignment-gap-closure": "spec-code-alignment-gap-closure.md",
}


def copy_file(source: Path, target: Path, force: bool) -> str:
    if target.exists() and not force:
        return f"skip {target}"
    target.parent.mkdir(parents=True, exist_ok=True)
    shutil.copy2(source, target)
    return f"write {target}"


def main() -> int:
    parser = argparse.ArgumentParser(description="Bootstrap a repo with the CC Switch workflow files.")
    parser.add_argument("--target-dir", required=True, help="Absolute or relative project directory to seed.")
    parser.add_argument("--playbook", required=True, choices=sorted(PLAYBOOK_FILES))
    parser.add_argument("--force", action="store_true", help="Overwrite existing files.")
    args = parser.parse_args()

    skill_root = Path(__file__).resolve().parent.parent
    knowledge_base = skill_root / "references" / "knowledge-base"
    templates_root = knowledge_base / "templates"
    playbooks_root = knowledge_base / "playbooks"
    workflows_root = knowledge_base / "workflows"
    target_dir = Path(args.target_dir).expanduser().resolve()

    required_dirs = [
        target_dir / ".meetings",
        target_dir / ".research",
        target_dir / ".plans",
        target_dir / ".handoff",
        target_dir / ".acceptance",
        target_dir / ".workflow",
        target_dir / ".decisions",
        target_dir / "SPECS",
    ]
    for directory in required_dirs:
        directory.mkdir(parents=True, exist_ok=True)

    writes = []
    template_map = {
        templates_root / "claude-md-template.md": target_dir / "CLAUDE.md",
        templates_root / "analysis-template.md": target_dir / "ANALYSIS.md",
        templates_root / "todo-yaml-template.md": target_dir / "TODO.yaml",
        templates_root / "spec-template.md": target_dir / "SPECS" / "_template.md",
        templates_root / "tdd-plan-template.md": target_dir / ".plans" / "_tdd-plan-template.md",
        templates_root / "agent-handoff-template.md": target_dir / ".handoff" / "_agent-handoff-template.md",
        templates_root / "acceptance-checklist-template.md": target_dir / ".acceptance" / "_acceptance-checklist.md",
        playbooks_root / PLAYBOOK_FILES[args.playbook]: target_dir / ".workflow" / "selected-playbook.md",
        workflows_root / "README.md": target_dir / ".workflow" / "stage-index.md",
        knowledge_base / "README.md": target_dir / ".workflow" / "knowledge-base-overview.md",
    }

    for source, target in template_map.items():
        writes.append(copy_file(source, target, args.force))

    manifest = {
        "skill": "cc-switch-dev-workflow",
        "playbook": args.playbook,
        "generated_at": datetime.now(timezone.utc).isoformat(),
        "target_dir": str(target_dir),
    }
    manifest_path = target_dir / ".workflow" / "bootstrap-manifest.json"
    if not manifest_path.exists() or args.force:
        manifest_path.write_text(json.dumps(manifest, indent=2, ensure_ascii=False) + "\n", encoding="utf-8")
        writes.append(f"write {manifest_path}")
    else:
        writes.append(f"skip {manifest_path}")

    print("\n".join(writes))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())